/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.yarn.api.protocolrecords;

import org.apache.hadoop.classification.InterfaceAudience.Public;
import org.apache.hadoop.classification.InterfaceStability.Stable;
import org.apache.hadoop.yarn.api.ApplicationClientProtocol;
import org.apache.hadoop.yarn.util.Records;

/**
 * <p>The request sent by clients to get cluster metrics from the 
 * <code>ResourceManager</code>.</p>
 * 
 * <p>Currently, this is empty.</p>
 *
 * @see ApplicationClientProtocol#getClusterMetrics(GetClusterMetricsRequest)
 */
@Public
@Stable
public abstract class GetClusterMetricsRequest {
  @Public
  @Stable
  public static GetClusterMetricsRequest newInstance() {
    GetClusterMetricsRequest request =
        Records.newRecord(GetClusterMetricsRequest.class);
    return request;
  }
}
